For convenience sake we are classifying the offences against the Spirit under two general divisions, namely, those committed by the unbeliever, and those committed by the believer. Not that there is absolutely no overlapping in either case. For, doubtless, in the very nature of the case there must be. This thought will be kept in mind in the study of the offences against the Spirit. 1. OFFENCES COMMITTED BY THE UNBELIEVER. a) Resisting the Holy Ghost. Acts 7:51-"Ye do always resist the Holy Ghost." Here the picture is that of the Holy Spirit attacking the citadel of the soul of man, who violently resists the gracious attempts of the Spirit to win him. In spite of the plainest arguments, and the most incontestable facts this man wilfully rejects the evidence and refuses to accept the Christ so convincingly presented. Thus is the Holy Ghost resisted. (See Acts 6:10.) That this is a true picture of resistance to the Holy Spirit is clearly seen from Stephen's recital of the facts in Acts 7:51-57. b) Insulting, or Doing Despite unto the Holy Spirit. Heb. 10:29 (cf. Luke 18:32). It is the work of the Spirit to present the atoning work of Christ to the sinner as the ground of his pardon. When the sinner refuses to believe or accept the testimony of the Spirit, he thereby insults the Spirit by esteeming the whole work of Christ as a deception and a lie, or accounts the death of Christ as the death of an ordinary or common man, and not as God's provision for the sinner. c) Blaspheming the Holy Spirit. Matt. 12:31,32. This seems to be the most grievous sin of all, for the Master asserts that there is no forgiveness for this sin. Sins against the Son of Man may be forgiven because it was easily possible, by reason of His humble birth, lowly parentage, etc., to question the claims He put forth to deity. But when, after Pentecost, the Holy Spirit came, and presented to every man's conscience evidence sufficient to prove the truth of these claims, the man who then refused to yield to Christ's claims was guilty of resisting, insulting, and that amounts to blaspheming the testimony of the whole Godhead, of which the Spirit is the executive. 2. OFFENCES COMMITTED BY THE BELIEVER. a) Grieving the Spirit.